Annual Average Concentrations of Sulphur Dioxide (SO2) in Delhi (1989 to 2000) | ||||||||
Year | Residental Area (Concentration in µg/m3) | Industrial Area (Concentration in µg/m3) | ||||||
Ashok Vihar | Sirifort | Janak Puri | Nizam- uddin | Average (Residental) | Shah- dara | Shahzada Bagh | Average (Industrial) | |
1989 | ||||||||
1990 | ||||||||
1991 | ||||||||
1992 | ||||||||
1993 | ||||||||
1994 | ||||||||
1995 | ||||||||
1996 | ||||||||
1997 | ||||||||
1998 | ||||||||
1999 | ||||||||
2000 |